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OC tutorial with Intel Core 2 Duo E7500 & DFI BI-P45 Elite

Core 2 Duo series are the first CPU with LGA775 socket; after launching C2D for few months,
Intel released the hi-end LGA775 solutions “Core 2 Quad”.
Currently, Core 2 Quad is still expensive. It costs more than USD $170 even you buy the cheapest one.
However, after price competition between AMD & Intel in mainstream market, the price of C2D is more acceptable.

For example, there are E8X00 (FSB 333MHz/ 6MB L2), E7X00 (FSB 266MHz/ 3MB L2),
E5X00 (FSB 200MHz/ 2MB L2) and E6300 (266MHz/ 2MB L2) for mainstream & extreme performance.
Or, you can also choose entry level solutions like E1X00 (FSB 200MHz/ 512K L2). All above CPU are based on C2D micro-architecture,
there are only different in L2 cache & frequency.

There is no cooper basement in this cooler; you can see it only in Quad core processors.

E7500

P45 is the latest chipset which supports LGA775 CPU, the potential of overclocking is very good.

DFI usually adopts ”Red” PCB into Blood-Iron series.
There is a sticker near north bridge to remind “Warranty avoid if you remove the cooler”
(as you see, there is no metal cover to protect Intel P45 chip).
In my experience, if you change the cooler without damage the chipset, DFI will cover the warranty.
So, please be careful when changing north bridge cooler.

P45 motherboard is the best OC platform for LGA775 CPU.
To get higher performance, you have to fine tune some options for E7500 (R0 stepping).

Core voltage under Hyper PI 32M is 1.248V, but t drop to 1.232V in full loading.
It means E7500 needs only 1.232V when OC to 4GHz, such as E8X00 series.
Under two different Vantage benchmark, it also needs 1.232V for 4GHZ.

To compare with 4GHz 1.232V, you can get higher result to 43.GHz by over voltage a little bit more.

Between E8X00 & E5X00 series, the E7500 product position is peculiar.
Someone think E7500 is just E6XXX with larger L2 cache, but I don’t agree.
According to the frequency and performance, E7500 should be hi-end product such as E8X00 series.

If you need to compress or en/decode audio & video files, E7500 with 3MB L2 cache is better than E5X/6X00 with 2MB cache only.
E7500 is a little bit more expensive than E6X00, but not so expensive as E8X00, I think it’s a compromise choice :)